Build.zig opt-in: error on unused .zig files in src/?

[Sze]

related topic:

Lazy compilation causing no compile errors within unused functions is a headache

I’m coming to Zig from Rust and mostly enjoying it (comptime is fantastic), but the one thing that’s been really frustrating is the lazy compiler and lack of errors for unused functions or even just warnings that they’re unused. If you write a function that contains invalid code and then don’t invoke it anywhere, your program will compile without so much as a warning from the compiler. This is really annoying, since often I write functions before I use them. I’ve been told “only write the funct…